【Oracle Database】manage oracle rac database on emcc12c

[root@wallet01 ~]# vi /etc/hosts
192.168.40.99 emcc.gscaifu.com

[root@wallet01 ~]# vi /etc/sudoers
# Disable "ssh hostname sudo <cmd>", because it will show the password in clear.
#         You have to run "ssh -t hostname sudo <cmd>".
#
# Defaults    requiretty
Defaults:oracle !requiretty

# Refuse to run if unable to disable echo on the tty. This setting should also be
# changed in order to be able to use sudo without a tty. See requiretty above.
#
# Defaults   !visiblepw
Defaults   visiblepw

## Allow root to run any commands anywhere
root    ALL=(ALL)       ALL
oracle  ALL=(ALL)       ALL

[root@wallet01 ~]# ln -s /usr/bin/sudo /usr/local/bin/sudo

[root@wallet01 ~]# su - oracle
[oracle@wallet01 ~]$ mkdir -p /u01/app/oracle/agent